Sin cos precalculation Garmin Connect IQ

var coefX = new[60], coefY = new[60];
for (var i = 0; i < 60; i++) {
    coefX[i] = Math.sin(i / 30.0 * 3.14159);
    coefY[i] = -Math.cos(i / 30.0 * 3.14159);
}